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資料編號: | HK-1606 |
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中文名稱: | 香港綬草 |
學名: | Spiranthes hongkongensis [找同屬植物] |
英文名稱: | Hong Kong Spiranthes |
植物科名: (APG新系統) | ORCHIDACEAE蘭科 [找同科植物] |
標室舊系統 | ORCHIDACEAE蘭科[找同科] |
生長習性: | 草本 |
原生/外來: | 香港原生植物 |
圖片花色: | white |
發現開花: | April |
資料更新: | 20190508 11:28:42 pm |
備註: 本種與綬草極為相似,根據胡秀英《香港蘭科屬誌》 香港綬草:花軸,苞片,萼片及子房有腹狀毛,柱頭呈盾狀,邊緣呈三尖形,蕊喙狹小,環形,連接至花粉塊中部,粘盤不明顯;花與花之間的度大約是120度,即係三朵花形成一圈 綬草:花軸,苞片,萼片及子房光滑無毛,柱頭近球形,蕊喙呈銳角三角形狀,尖端分裂,粘盤橢圓形,花與花連續排列形成螺旋 1606e-g: photo taken 20140510 1606a-d: photo by May Cheng on 2015.3.29 香港綬草:花軸,苞片,萼片及子房有腹狀毛 綬草:花軸,苞片,萼片及子房光滑無毛, 香港綬草又叫毛綬草就係此原因(ref:馬老師出的香港有趣植物一書, ) 深圳植物誌: 植株高10-46cm。根指狀,肉質,直徑1. 4-3. 6mm。葉2-6枚,條形倒披針形,長4-14cm,寬0. 5-1cm,基部收狹為抱莖的鞘,先端急尖。總狀花序頂生,直立,長10-42cm,向上方逐漸密被腺毛;花序軸長3. 5-13cm,其上著生多數螺旋狀排列的花;花苞片披針形,疏被腺毛,先端漸尖;花白色;花梗連子房長4-5mm,被腺毛;中萼片長圓形,舟狀,長3. 5-4. 5mm,寬1. 4-1. 7mm,與花瓣合生成兜狀,背面被腺毛,先端鈍,側萼片長圓狀披針形,稍偏斜,長3. 5-4. 5mm,寬1. 4-1. 7mm,背面被腺毛,先端鈍;花瓣白色,有時帶淡粉紅色,長圓形,稍偏斜,長3. 5-4. 5mm,寬1. 5-1. 7mm,質地薄,先端鈍;唇瓣闊長圓形,長4-5. 5mm,寬2. 4-2. 7mm,基部增厚且具2枚透明的球狀腺體,側緣直立並捲曲,先端截形或鈍且彎曲,唇盤具乳突;合蕊柱直立,長0. 9-1. 1mm;花藥卵形;花粉糰長0. 8-1mm;蕊喙三角狀披針形;子房綠色,被腺毛,柱頭稍隆起,盾形,明顯3裂。花期3-4月。 FoHK: Notes: The type specimen (S. Y. Hu 13658, K, holotype; A, CUHK, isotype) was collected from Tai Po in 1975. Further to Hu and Barretto’s (1976) observations, Sun (1996a, Amer. J. Bot. 83: 252–260) discussed the allopolyploid origin of this self-fertile species, which is a tetraploid (chromosome number ≈60) with putative parents being S. sinensis and S. spiralis (L.) Chevall. Spiranthes sinensis(綬草) is a pollinator-dependent outcrosser, whereas S. hongkongensis(香港綬草) is a pollinator-independent selfer, flowering 2–3 weeks earlier than S. sinensis (Sun 1996b, Conservation Biol. 10: 785–795). Spiranthes sinensis is glabrous(無毛) on floral parts and its flower colour is normally pink and occasionally white, in a prominent spiral(突出的螺旋) spike, whereas S. hongkongensis has grandular hairs on its bracts, sepals and ovaries in the creamy white flowers, inconspicuously(不明顯) arranged on a spiral spike. Rare occurrence of natural hybrids have also been observed, featuring both pinkish flowers and glandular hairs on floral parts. | |
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8-1606h | |
7-1606g | |
6-1606f | |
5-1606e | |
4-1606d | |
3-1606c | |
2-1606b | |
1-1606a | |